Protactinium
Protactinium (formerly protoactinium) is a chemical element with the symbol Pa and atomic number 91. It is a dense, silvery-gray actinide metal which readily reacts with oxygen, water vapor and inorganic acids. It forms various chemical compounds in which protactinium is usually present in the oxidation state +5, but it can also assume +4 and even +3 or +2 states. Concentrations of protactinium in the Earth's crust are typically a few parts per trillion, but may reach up to a few parts per million in some uraninite ore deposits. Because of its scarcity, high radioactivity and high toxicity, there are currently no uses for protactinium outside scientific research, and for this purpose, protactinium is mostly extracted from spent nuclear fuel.
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Protactinium
Protactinium (formerly protoactinium) is a chemical element with the symbol Pa and atomic number 91. It is a dense, silvery-gray actinide metal which readily reacts with oxygen, water vapor and inorganic acids. It forms various chemical compounds in which protactinium is usually present in the oxidation state +5, but it can also assume +4 and even +3 or +2 states. Concentrations of protactinium in the Earth's crust are typically a few parts per trillion, but may reach up to a few parts per million in some uraninite ore deposits. Because of its scarcity, high radioactivity and high toxicity, there are currently no uses for protactinium outside scientific research, and for this purpose, protactinium is mostly extracted from spent nuclear fuel.
has abstract
Dúil radaighníomhach é an prót ...... aídiúcháin +II agus +III aige.
@ga
El protactinio es un elemento ...... Pa y su número atómico es 91.
@es
El protoactini és un element q ...... perconductor per sota d'1,4 K.
@ca
Il protoattinio è l'elemento c ...... e il processo di riproduzione.
@it
Le protactinium est un élément ...... radioactive de l'uranium 235.
@fr
O protactínio é um elemento qu ...... em 1913 por Kasimir Fajans e .
@pt
Protactinium (formerly protoac ...... various geological processes.
@en
Protactinium (verkürzt aus urs ...... tinium wird künstlich erzeugt.
@de
Protactinium is een scheikundi ...... alliek zilverkleurig actinide.
@nl
Protaktinio estas kemia elemen ...... iva elemento, konita por ĝia .
@eo
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Dúil radaighníomhach é an prót ...... an tóiriam seo, gheofar 231Pa.
@ga
El protactinio es un elemento ...... Pa y su número atómico es 91.
@es
El protoactini és un element q ...... perconductor per sota d'1,4 K.
@ca
Il protoattinio è l'elemento c ...... ombustibile nucleare esaurito.
@it
Le protactinium est un élément ...... radioactive de l'uranium 235.
@fr
O protactínio é um elemento qu ...... em 1913 por Kasimir Fajans e .
@pt
Protactinium (formerly protoac ...... acted from spent nuclear fuel.
@en
Protactinium (verkürzt aus urs ...... tinium wird künstlich erzeugt.
@de
Protactinium is een scheikundi ...... alliek zilverkleurig actinide.
@nl
Protaktinio estas kemia elemen ...... iva elemento, konita por ĝia .
@eo
label
Protactinio
@es
Protactinium
@de
Protactinium
@en
Protactinium
@fr
Protactinium
@nl
Protactínio
@pt
Protaktinio
@eo
Protaktinio
@eu
Protaktinium
@cs
Protaktinium
@in